/*
 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */
package org.apache.http.examples.client;

import java.io.IOException;
import java.util.concurrent.TimeUnit;

import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.pool.PoolStats;
import org.apache.http.util.EntityUtils;

/**
 * Example demonstrating how to evict expired and idle connections from the connection pool.
 */
public class ClientEvictExpiredConnections {
	
	public static void main(String[] args) throws ClientProtocolException, IOException, InterruptedException {
		PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();
		cm.setMaxTotal(100);
		CloseableHttpClient httpclient = HttpClients.custom().setConnectionManager(cm).evictExpiredConnections().evictIdleConnections(5L, TimeUnit.SECONDS).build();
		try {
			// create an array of URIs to perform GETs on
			String[] urisToGet = { "http://hc.apache.org/", "http://hc.apache.org/httpcomponents-core-ga/", "http://hc.apache.org/httpcomponents-client-ga/", };
			
			for (int i = 0; i < urisToGet.length; i++) {
				String requestURI = urisToGet[i];
				HttpGet request = new HttpGet(requestURI);
				
				System.out.println("Executing request " + requestURI);
				
				CloseableHttpResponse response = httpclient.execute(request);
				try {
					System.out.println("----------------------------------------");
					System.out.println(response.getStatusLine());
					EntityUtils.consume(response.getEntity());
				} finally {
					response.close();
				}
			}
			
			PoolStats stats1 = cm.getTotalStats();
			System.out.println("Connections kept alive: " + stats1.getAvailable());
			
			// Sleep 10 sec and let the connection evictor do its job
			Thread.sleep(10000);
			
			PoolStats stats2 = cm.getTotalStats();
			System.out.println("Connections kept alive: " + stats2.getAvailable());
			
		} finally {
			httpclient.close();
		}
	}
	
}
